The melting points and boiling points upto meddle of 3d- series ____________________?
Correct answer: A. increases
- A. increases
- B. decreases
- C. remain same
- D. no regular trend
Explanation
The melting and boiling points of the 3d transition elements generally increase towards the middle of the series because more unpaired d electrons strengthen metallic bonding. After the middle, the number of unpaired electrons and the bonding strength decrease, so the trend reverses. The likely mistake is choosing no regular trend because transition-metal properties are not perfectly smooth across the entire series.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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531 free Transition Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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